A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Aircraft Tire Pressure and Pavement Temperature Effects on HMA and WMA Strains
In a mechanistic-empirical pavement design framework, critical pavement responses are the most important input parameters for empirical damage models. Any mechanistic model developed to predict such responses should be validated in terms of measured responses. Pavement instrumentation such as earth pressure cells, asphalt strain gages, and temperature probes have long been used to determine such responses and develop damage algorithms for airfield flexible pavements. This paper summarizes the instrumentation effort and subsequent measurement of pavement responses during accelerated pavement tests under high tire pressure and temperature, conducted at the FAA’s National Airport Pavement and Materials Research Center (NAPMRC). A total of six test lanes were constructed with hot and warm mix asphalt materials at two different binder grades. Each of the test lanes had three different test sections. Respective test sections were instrumented with asphalt strain gages at the bottom of the asphalt concrete layer, earth pressure cells at the layer interfaces and multiple temperature probes within the asphalt concrete layer. Using the sixth generation heavy vehicle simulator for airport, the constructed test sections were trafficked with a bi-directional wheel load of 273 kN exerting two different tire pressures of 1.45 and 1.75 MPa. Rutting susceptibility of these sections was studied at the pavement temperature of 32 and 49°C at a depth of 5.1 cm from the surface. For both of the mix types, asphalt concrete with neat performance grade binder exhibited higher magnitude of tensile strain compared to polymer modified asphalt concrete layer.
Aircraft Tire Pressure and Pavement Temperature Effects on HMA and WMA Strains
In a mechanistic-empirical pavement design framework, critical pavement responses are the most important input parameters for empirical damage models. Any mechanistic model developed to predict such responses should be validated in terms of measured responses. Pavement instrumentation such as earth pressure cells, asphalt strain gages, and temperature probes have long been used to determine such responses and develop damage algorithms for airfield flexible pavements. This paper summarizes the instrumentation effort and subsequent measurement of pavement responses during accelerated pavement tests under high tire pressure and temperature, conducted at the FAA’s National Airport Pavement and Materials Research Center (NAPMRC). A total of six test lanes were constructed with hot and warm mix asphalt materials at two different binder grades. Each of the test lanes had three different test sections. Respective test sections were instrumented with asphalt strain gages at the bottom of the asphalt concrete layer, earth pressure cells at the layer interfaces and multiple temperature probes within the asphalt concrete layer. Using the sixth generation heavy vehicle simulator for airport, the constructed test sections were trafficked with a bi-directional wheel load of 273 kN exerting two different tire pressures of 1.45 and 1.75 MPa. Rutting susceptibility of these sections was studied at the pavement temperature of 32 and 49°C at a depth of 5.1 cm from the surface. For both of the mix types, asphalt concrete with neat performance grade binder exhibited higher magnitude of tensile strain compared to polymer modified asphalt concrete layer.
Aircraft Tire Pressure and Pavement Temperature Effects on HMA and WMA Strains
Kazmee, Hasan (author) / Garg, Navneet (author) / Knieriem, Russell (author) / Gerke, John (author) / Villafane, Wilfredo (author)
International Airfield and Highway Pavements Conference 2019 ; 2019 ; Chicago, Illinois
Airfield and Highway Pavements 2019 ; 322-332
2019-07-18
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 1996
| British Library Online Contents | 1996